According to Oxford Dictionary it is goat's cheese or goat cheese: https://en.oxforddictionaries.com/definition/goat's_cheese
I missed the apostrophe when typing the English - I'm lazy - but I've been noticing Duo gives this weird comment
"You have an extra space. He loves goat s cheese."
I don't have an extra space, in fact I need a space with an apostrophe between the 't' and the 's'.
Is this a Mac thing?